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Article type: Research Article
Authors: Rupnik Poklukar, Darjaa; * | Žerovnik, Janezb; c
Affiliations: [a] Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, SI-1000 Ljubljana, Slovenia. darja.rupnik@fs.uni-lj.si | [b] Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, SI-1000 Ljubljana, Slovenia | [c] Institute of Mathematics, Physics and Mechanics, Jadranska 19, SI-1000 Ljubljana, Slovenia. janez.zerovnik@fs.uni-lj.si
Correspondence: [*] Address for correspondence: Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, SI-1000 Ljubljana, Slovenia.
Abstract: Closeness is a measure of centrality, an important feature of communication and social networks. Extremal networks among all graphs and among several subclasses of graphs including trees and cacti are given. In addition, maximal graphs among cacti with fixed number of cycles and among cacti with given number of cut edges are provided.
Keywords: Closeness, graph operations, extremal graphs
DOI: 10.3233/FI-2019-1815
Journal: Fundamenta Informaticae, vol. 167, no. 3, pp. 219-234, 2019
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